Geriatric-onset of a first-episode mania is a rare psychiatric condition, which may be caused by a heterogeneous group of non-psychiatric conditions. To confirm late-onset bipolar disorder (LOBD) diagnosis, secondary-mania causes should be ruled out.

To provide a comprehensive review reporting prevalence, features, differential diagnosis, comorbidity and treatment of LOBD.

The literature was systematically reviewed by online searching using PubMed®. The authors selected review papers with the words “Late-onset mania” and/or “Late-onset bipolar” in the title and/or abstract published in the last 10 years.

With population ageing, LOBD is becoming a more prevalent disorder. Clinical presentation may be atypical and confounding, making the diagnosis not always obvious. Several non-psychiatric conditions must be considered in an elderly patient presenting with new-onset mania, namely stroke, dementia, hyperthyroidism or infection causing delirium. Only then LOBD diagnosis may be done, making that an exclusion diagnosis. Comorbidities, such as hypertension or renal insufficiency are often present in the elderly and must be taken into account when choosing a mood stabilizer.

LOBD remains a complex and relatively understudied disorder with important diagnostic and therapeutic implications. This diagnosis must be kept in mind for every elderly patient presenting with new-onset mania. Further investigations could contribute to a better understanding of LOBD etiopathogenesis and to set out better treatment guidelines.

The authors have not supplied their declaration of competing interest.